Besides me has any one noticed when riding on say an old chipped sealed
asphalt road there a very noticeable loss of traction and speed as bike
bounces every so slightly over exposed rough surface. Then when surface
changes to very smooth asphalt ride is of course smooth but your speed
increases for same effort. Therefore would a stiff frame result in a
loss of traction for all but smooth roads and a frame with more flex be
the faster over a long ride assuming same effort and the one to own. My
experience is that a flexible versus stiff is preferred on rides over 75
miles. As most roads are not smooth for majority of roads on west coast
USA.
Just thought
Charles Nighbor
Walnut Creek, CA